Improvement in fulverizing-chasers



PUGH.

or@ M111,

No 98.297 .Patented Deo. 28, 1869,

ttnied ,entre @sind @utilice THEoPtIILUs Pneu, oF CHICAGO, ILLINOIS.

Letters Patent N 98,297, dated December 2.8, 1869; autel-lated August 7, 1869. 4

IMPROVIElMl-IT IN PULVERIZING-CHASERS.

The Schedule'referrzd to in these Letters Patent and making part of the same` curate description tbereot`reterenee being,r had to the substances, and consists in` the combination and ar-l rangement ot' the several parts ofthe crushing-wheel, consistingz,r of chilled-iron tires in sections, provided with dovctails, for the purpose of engaging in proper slots inthe main wheel, the wheel and tire heilig separated in all parts by a l'aycr of wood, and secured iirlnly together by metallic wedges.

In the drawings- A represents one ofthe chasers, consisting of a heavy cast-iron wheel, provided with dovetnil slots, in

'which are inserted the dovetail lugs b ot the segments B. These segments are of chilled iron on their outer surfaces, which enables them to resist the great abrasive action to which they are subjected. The lugs vare secured in the slots by keys a, but, between the vexterior surface of the wheel and the interior surface oi' the segments is interposed a backing ot"wood, c, Awhich serves as a cushion to prevent the impact ot' the tire, upon the material being crushed, from being transferred to the wheel A. The elasticity ot' this backing also serves to prevent breakage of the segment. y I

In the bottom of the groove or pan'n which the chasers travel, I place n false bottom, composed of rfour or more closely-fitted segments-C. flhese seg.;-

soft-iron to prevent cracking in cooling; hence, itfsoon`v` wears out. By the use ot' the chilled segmentgaj hard surface is presented to the action' of the chasers,v whose destructive action they will resist for a long time. When worn, they are easily replaced, at a small cost.

I do not pretend that the wheel A, the segmentary tire B, the wooden backing c, or the wedges a, are of themselves new, and I do not claim either of them broadly; but

\Vhat I claim as my invention, and desire to secure by Letters Patent, is-

The combination 'and arrangement of the wheel A, the tire B, the wooden backing c, and the wedges a, when constructed and operating as and for the pur.- poses above set t'orth'and shown.

THEOPHILUS PUGH.

Witnesses:

H. F. EBERTS, H. S. SPRAGUE. 

